A laser alignment device for turbine shafting during maintenance

Abstract

This invention relates to the field of steam turbine maintenance technology. The invention provides a shaft system laser alignment device for steam turbine maintenance, comprising a base plate and a steam turbine body. An electric slide rail is fixedly installed on the top of the base plate, and a sliding seat is movably sleeved on the top of the electric slide rail. This invention's shaft system laser alignment device, through the inclusion of a detection component, allows for shaft system alignment detection when a reducer is activated. The reducer, via a winding wheel, drives a lifting pulley to move up and down, thus moving the detection host up and down, achieving height adjustment of the detection host. Simultaneously, a primary drive motor is activated, causing a sliding block to reciprocate via a threaded column, thus moving the detection host reciprocally, achieving horizontal position adjustment of the detection host. This, in turn, achieves automatic adjustment of the laser emitter's suspension position, facilitating the adjustment of the laser beam's position.

Description

Technical Field

[0001] This invention relates to the field of steam turbine maintenance technology, specifically to a shaft laser alignment device for steam turbine maintenance. Background Technology

[0002] Currently, the turbine shaft and coupling are connected via a flanged short pipe. Rigid springs are installed on both sides of the flanged short pipe. During major overhauls of the centrifugal pump coupling, the connecting short pipe must be removed. After the overhaul, before installing the connecting short pipe, the coupling and turbine shaft must be aligned. After alignment, the flanged short pipe between the turbine shaft and coupling is installed. Failure to align will result in uneven circumferential clearance in the shaft system, leading to significant air leakage during turbine operation. Currently, turbine shaft alignment is generally performed manually using laser measuring tools. While this method is simple, it still has the following drawbacks:

[0003] 1. When using laser measuring tools to inspect the central shaft of a steam turbine, the central shaft has multiple inspection directions, which requires frequent adjustments to the position of the laser measuring tool. Furthermore, due to the high precision and large size of the laser measuring tool, manual adjustment is laborious and prone to errors, leading to increased errors in the inspection data.

[0004] 2. At the same time, since most laser centering devices have fixed-angle or rigid connection structures for their transmitting and receiving modules, it is difficult to flexibly adjust the laser emission direction or adapt to non-horizontal installation surfaces. This makes it difficult to complete effective measurements in confined spaces or special working conditions, requiring repeated disassembly and reassembly of the laser centering device, resulting in low efficiency in turbine centering maintenance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a shaft laser centering device for turbine maintenance, including a base plate and a turbine body. An electric slide rail is fixedly installed on the top of the base plate. A sliding seat is movably sleeved on the top of the electric slide rail. A sliding frame is fixedly connected to the top of the sliding seat. A sliding block is movably sleeved on the top of the sliding frame. A reducer is fixedly installed on the side of the sliding block. A winding wheel is fixedly sleeved on the output shaft of the reducer. A wire rope is fixedly sleeved inside the winding wheel. A lifting pulley is movably sleeved outside the wire rope. A protective cover is movably sleeved at the bottom of the lifting pulley. A detection host is fixedly installed inside the protective cover. A detection component is provided at the bottom of the protective cover. The detection component includes:

[0006] A limiting sleeve is fixedly connected to the bottom of the protective cover. A first telescopic arm and a second telescopic arm are movably fitted inside the limiting sleeve. A laser emitter is fixedly connected to one end of the first telescopic arm, and a laser rangefinder is fixedly connected to the bottom of the laser emitter. A counterweight is fixedly connected to one end of the second telescopic arm. A first drive motor is fixedly installed on the side of the sliding frame. A first threaded post is fixedly connected to the output shaft of the first drive motor, and the first threaded post is threadedly fitted inside the sliding block.

[0007] Preferably, the number of laser rangefinders is three, and the three laser rangefinders are evenly distributed around the outside of the laser emitting head.

[0008] Preferably, the counterweight is made of stainless steel, and the weight of the counterweight is the same as that of the counterweight block.

[0009] Preferably, the limiting sleeve is located directly below the protective cover, and the limiting sleeve is adapted to the first telescopic arm.

[0010] Preferably, the limiting sleeve is provided with an adjustment component, which includes a second drive motor, which is fixedly installed at the bottom of the inner cavity of the protective cover. A first bevel gear is fixedly sleeved on the output shaft of the second drive motor. A bidirectional threaded rod is threaded into the inner thread of the first telescopic arm. A second bevel gear is fixedly sleeved on the outer thread of the bidirectional threaded rod. The second bevel gear meshes with the first bevel gear. An auxiliary mechanism is provided inside the sliding frame.

[0011] Preferably, the auxiliary mechanism includes a first lifting block, which is movably sleeved inside one side of the sliding frame, and a second lifting block is movably sleeved inside the other side of the sliding frame. A lifting beam is fixedly connected to the side of the first lifting block, and a magnetic plate is fixedly connected to the top of the lifting beam. A second threaded column is movably sleeved inside the sliding frame, and a magnetic block is fixedly connected to the bottom of the protective cover.

[0012] Preferably, a lifting assembly is provided on the side of the sliding frame. The lifting assembly includes a No. 3 motor, which is fixedly installed on the side of the sliding frame. A transmission rod is fixedly connected to the output shaft of the No. 3 motor. A No. 3 bevel gear is fixedly sleeved on the outside of the transmission rod. A No. 4 bevel gear is fixedly sleeved on the bottom of the No. 2 threaded column. The No. 4 bevel gear meshes with the No. 3 bevel gear.

[0013] Preferably, a sliding ball is movably sleeved on the side of the first lifting block, and the number of the sliding balls is several, with the several sliding balls evenly distributed on the side of the first lifting block.

[0014] To solve the above-mentioned technical problems, the present invention provides a shaft laser centering device for steam turbine maintenance by setting up a laser rangefinder.

[0015] The beneficial effects of this invention are as follows:

[0016] A shaft alignment laser alignment device for turbine maintenance, by setting up a detection component, when a turbine shaft alignment detection is required, the reducer is started, so that the reducer drives the lifting pulley to move up and down through the winding wheel, that is, drives the detection host to move up and down, thereby achieving the height adjustment effect of the detection host. At this time, the first drive motor is started, so that the first drive motor drives the sliding block to move back and forth through the first threaded column, that is, drives the detection host to move back and forth, thereby achieving the horizontal position adjustment effect of the detection host, and thus achieving the automatic adjustment effect of the suspension position of the laser emitter head, thereby bringing convenience to the position adjustment of the laser beam.

[0017] A turbine shaft alignment laser device for turbine maintenance utilizes laser rangefinders. When turbine shaft alignment is required, the laser emitter and laser rangefinders are moved inside the turbine body. The laser emitter and rangefinders are then activated, allowing the three rangefinders to measure the distance between the laser emitter and the inner wall of the turbine body. When the measurements from the three rangefinders are identical, the turbine shaft center is achieved, resulting in automatic turbine shaft alignment and facilitating turbine shaft alignment detection.

[0018] A shaft alignment laser alignment device for steam turbine maintenance, through the setting of an auxiliary mechanism, activates a second drive motor when shaft alignment is required in the confined space inside the steam turbine. This second drive motor, via a first and second bevel gear, drives a bidirectional threaded rod to rotate, thereby causing a first telescopic arm to move horizontally. This telescopic arm then extends the laser emitter and laser rangefinder into the confined space inside the steam turbine, achieving shaft alignment within the confined space and thus broadening the applicability of the shaft alignment device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a preferred embodiment of a laser alignment device for turbine maintenance provided by the present invention.

[0020] Figure 2 This is a front view of the detection host in this invention;

[0021] Figure 3 This is a bottom view of the sliding frame in this invention;

[0022] Figure 4 This is a front view of the limiting sleeve in this invention;

[0023] Figure 5 This is a front view of the sliding frame in this invention;

[0024] Figure 6 This is a top view of the turbine body in this invention;

[0025] Figure 7 This is a front view of the lifting component in this invention;

[0026] The names of the components corresponding to the markings in the above attached diagrams are as follows: 1. Base plate; 2. Steam turbine body; 3. Electric slide rail; 4. Sliding seat; 5. Sliding frame; 6. Sliding block; 7. Reducer; 8. Winding reel; 9. Wire rope; 10. Lifting pulley; 11. Protective cover; 12. Detection host; 13. Detection component; 131. Limit sleeve; 132. Telescopic arm No. 1; 133. Telescopic arm No. 2; 134. Laser emitter; 135. Laser rangefinder; 136. Counterweight; 137. Drive motor No. 1; 138. 14. Adjustment assembly; 141. Drive motor No. 2; 142. Bevel gear No. 1; 143. Bidirectional threaded rod; 144. Bevel gear No. 2; 15. Auxiliary mechanism; 151. Lifting block No. 1; 152. Lifting block No. 2; 153. Lifting beam; 154. Magnetic plate; 155. Threaded column No. 2; 156. Magnetic block; 16. Lifting assembly; 161. Motor No. 3; 162. Transmission rod; 163. Bevel gear No. 3; 164. Bevel gear No. 4; 17. Sliding ball. Detailed Implementation

[0027] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0028] like Figures 1-4As shown, the present invention provides a shaft laser alignment device for turbine maintenance, comprising a base plate 1 and a turbine body 2. An electric slide rail 3 is fixedly mounted on the top of the base plate 1. A sliding seat 4 is movably sleeved on the top of the electric slide rail 3. A sliding frame 5 is fixedly connected to the top of the sliding seat 4. A sliding block 6 is movably sleeved on the top of the sliding frame 5. A reducer 7 is fixedly mounted on the side of the sliding block 6. A winding wheel 8 is fixedly sleeved on the output shaft of the reducer 7. A wire rope 9 is fixedly sleeved inside the winding wheel 8. The wire rope 9 is movably sleeved outside... A lifting pulley 10 is connected to the bottom of the lifting pulley 10, and a protective cover 11 is movably fitted onto the bottom of the lifting pulley 10. A detection host 12 is fixedly installed inside the protective cover 11. A detection component 13 is provided at the bottom of the protective cover 11. The detection component 13 includes a limiting sleeve 131, which is fixedly connected to the bottom of the protective cover 11. A first telescopic arm 132 is movably fitted inside the limiting sleeve 131, and a second telescopic arm 133 is movably fitted inside the limiting sleeve 131. A laser emitter 13 is fixedly connected to one end of the first telescopic arm 132. 4. A laser rangefinder 135 is fixedly connected to the bottom of the laser emitter 134. A counterweight 136 is fixedly connected to one end of the second telescopic arm 133. A first drive motor 137 is fixedly installed on the side of the sliding frame 5. A first threaded post 138 is fixedly connected to the output shaft of the first drive motor 137. The first threaded post 138 is threaded into the inside of the sliding block 6. By setting the detection component 13, when the turbine shaft alignment detection is required, the reducer 7 is started, so that the reducer 7 can drive the lifting pulley 10 to move up and down through the winding wheel 8, that is, drive the detection host 12 to move up and down, thereby achieving the height adjustment effect of the detection host 12. At this time, the first drive motor 137 is started, so that the first drive motor 137 can drive the sliding block 6 to move back and forth through the first threaded post 138, that is, drive the detection host 12 to move back and forth, thereby achieving the horizontal position adjustment effect of the detection host 12, and thus achieving the automatic adjustment effect of the suspension position of the laser emitter 134, thereby bringing convenience to the position adjustment of the laser beam.

[0029] like Figure 4 and Figure 6 As shown, there are three laser rangefinders 135, which are evenly distributed around the laser transmitter 134 on its exterior. By setting up the laser rangefinders 135, when turbine shaft alignment is required, the laser transmitter 134 and the laser rangefinders 135 are moved into the turbine body 2. At this time, the laser transmitter 134 and the laser rangefinders 135 are activated, allowing the three laser rangefinders 135 to detect the distance between the laser transmitter 134 and the inner wall of the turbine body 2. When the measurement results of the three laser rangefinders 135 are the same, the turbine body 2 shaft center positioning effect is achieved, thus achieving the automatic alignment effect of the turbine shaft system, which brings convenience to the alignment detection of the turbine shaft system.

[0030] like Figure 4 and Figure 6 As shown, the counterweight 136 is made of stainless steel, and its weight is the same as that of the counterweight 136. By setting the counterweight 136, when the first telescopic arm 132 drives the laser emitter 134 to telescopically move, the second telescopic arm 133 can drive the counterweight 136 to move in the opposite direction in a quantitative manner, thereby achieving the center of gravity positioning effect of the limiting sleeve 131. This avoids the problem of the center of gravity of the limiting sleeve 131 shifting and tilting when the laser emitter 134 moves horizontally, thus improving the stability of the laser emitter 134 when moving horizontally.

[0031] like Figure 1 and Figure 4 As shown, the limiting sleeve 131 is located directly below the protective cover 11, and the limiting sleeve 131 is adapted to the first telescopic arm 132. By setting the limiting sleeve 131, when the laser emitter 134 moves horizontally, the limiting sleeve 131 can limit the telescopic first arm 132 and the second telescopic arm 133, thereby avoiding the problem of the first telescopic arm 132 and the second telescopic arm 133 shifting during telescopic movement, thus improving the stability of the first telescopic arm 132 and the second telescopic arm 133 during telescopic movement.

[0032] like Figure 4 and Figure 6 As shown, the limiting sleeve 131 has an adjustment component 14 inside. The adjustment component 14 includes a second drive motor 141, which is fixedly installed at the bottom of the inner cavity of the protective cover 11. A first bevel gear 142 is fixedly sleeved on the output shaft of the second drive motor 141. A double-threaded rod 143 is threaded inside the first telescopic arm 132, and a second bevel gear 144 is fixedly sleeved on the outside of the double-threaded rod 143. The second bevel gear 144 meshes with the first bevel gear 142. An auxiliary mechanism 15 is provided inside the sliding frame 5. When the auxiliary mechanism 15 needs to perform shaft alignment in the confined space inside the steam turbine, the second drive motor 141 is started, which drives the bidirectional threaded rod 143 to rotate through the first bevel gear 142 and the second bevel gear 144. This causes the first telescopic arm 132 to move horizontally, which in turn causes the first telescopic arm 132 to extend the laser emitter 134 and the laser rangefinder 135 into the confined space inside the steam turbine. This achieves the shaft alignment effect inside the confined space of the steam turbine, thereby improving the versatility of the shaft alignment device.

[0033] like Figures 5-7As shown, the auxiliary mechanism 15 includes a first lifting block 151, which is movably sleeved inside one side of the sliding frame 5. A second lifting block 152 is movably sleeved inside the other side of the sliding frame 5. A lifting beam 153 is fixedly connected to the side of the first lifting block 151. A magnetic plate 154 is fixedly connected to the top of the lifting beam 153. A second threaded post 155 is movably sleeved inside the sliding frame 5. A magnetic block 156 is fixedly connected to the bottom of the protective cover 11. By setting the auxiliary mechanism 15, when the position of the detection host 12 is adjusted and positioned, the magnetic plate 154 is moved to the bottom of the magnetic block 156, so that the magnetic plate 154 can be attracted to the limiting sleeve 131 without contact through the magnetic block 156. This increases the vertical weight of the limiting sleeve 131, avoids the problem of continuous swinging when the limiting sleeve 131 moves, and improves the stability of the detection host 12 during position adjustment.

[0034] like Figure 5 and Figure 7 As shown, a lifting assembly 16 is provided on the side of the sliding frame 5. The lifting assembly 16 includes a third motor 161, which is fixedly installed on the side of the sliding frame 5. A transmission rod 162 is fixedly connected to the output shaft of the third motor 161. A third bevel gear 163 is fixedly sleeved on the outside of the transmission rod 162. A fourth bevel gear 164 is fixedly sleeved on the bottom of the second threaded column 155. The fourth bevel gear 164 meshes with the third bevel gear 163. By setting up the lifting assembly 16, when the height of the magnet plate 154 needs to be adjusted, the third motor 161 is started, so that the third motor 161 drives the second threaded column 155 to rotate through the transmission rod 162 and the third bevel gear 163, that is, drives the second lifting block 152 to move up and down, thereby achieving the height adjustment effect of the lifting beam 153, that is, the height adjustment effect of the magnet plate 154, thus bringing convenience to the position adjustment of the magnet plate 154.

[0035] like Figure 7 As shown, a sliding ball 17 is movably sleeved on the side of the first lifting block 151. The number of sliding balls 17 is several, and the several sliding balls 17 are evenly distributed on the side of the first lifting block 151. By setting the first lifting block 151, when the height of the first lifting block 151 needs to be adjusted, the sliding ball 17 can limit the up-and-down movement of the first lifting block 151, thereby avoiding the problem of friction between the first lifting block 151 and the inner wall of the sliding frame 5 when the first lifting block 151 moves up and down for a long time, thus improving the smoothness of the first lifting block 151 when moving up and down.

[0036] The working principle of this invention is as follows: First, when turbine shaft alignment detection is required, the reducer 7 is started, allowing the reducer 7 to drive the lifting pulley 10 up and down via the winding wheel 8, which in turn drives the detection host 12 up and down, thus achieving the height adjustment effect of the detection host 12. At this time, the first drive motor 137 is started, allowing the first drive motor 137 to drive the sliding block 6 to reciprocate via the first threaded column 138, which in turn drives the detection host 12 to reciprocate, thus achieving the horizontal position adjustment effect of the detection host 12, and further achieving the automatic adjustment effect of the suspension position of the laser emitter 134, thereby facilitating the position adjustment of the laser beam. When turbine shaft alignment is required, the laser emitter 134 and the laser beam are aligned. The optical rangefinder 135 moves into the turbine body 2. At this time, the laser emitter 134 and the laser rangefinder 135 are activated, allowing the three laser rangefinders 135 to detect the distance between the laser emitter 134 and the inner wall of the turbine body 2. When the measurements from the three laser rangefinders 135 are identical, the turbine body 2 shaft center positioning effect is achieved. When the first telescopic arm 132 drives the laser emitter 134 to extend and retract, the second telescopic arm 133 drives the counterweight 136 to move in the opposite direction, achieving the center-of-gravity positioning effect of the limiting sleeve 131. This avoids the problem of the limiting sleeve 131 tilting due to center-of-gravity shift when the laser emitter 134 moves horizontally, thus improving the stability of the laser emitter 134 during horizontal movement. When the laser emitter 134 moves horizontally, the limiting sleeve 131 limits the extension and retraction of the first telescopic arm 132 and the second telescopic arm 133, preventing misalignment during their extension and retraction, thus improving the stability of their movement. When it is necessary to align the shaft system in the confined space inside the turbine, the second drive motor 141 is activated. This allows the second drive motor 141 to drive the bidirectional threaded rod 143 to rotate via the first bevel gear 142 and the second bevel gear 144, thereby causing the first telescopic arm 132 to move horizontally. This allows the first telescopic arm 132 to extend the laser emitter 134 and the laser rangefinder 135 into the confined space inside the turbine. The internal space of the turbine is narrow, thus achieving shaft alignment within the confined space and broadening the applicability of the shaft alignment device. During the position adjustment and positioning of the main testing unit 12, the magnetic plate 154 is moved to the bottom of the magnetic block 156, allowing the magnetic plate 154 to achieve contactless attraction to the limiting sleeve 131 via the magnetic block 156. This increases the vertical weight of the limiting sleeve 131, preventing continuous swaying during movement and improving the stability of the main testing unit 12's position adjustment. When the height of the magnetic plate 154 needs adjustment, the third motor 161 is started, causing it to drive the second threaded column 155 to rotate via the transmission rod 162 and the third bevel gear 163.This causes the second lifting block 152 to move up and down, thereby achieving the height adjustment effect of the lifting beam 153, which in turn achieves the height adjustment effect of the magnetic plate 154. This facilitates the position adjustment of the magnetic plate 154. When the height of the first lifting block 151 needs to be adjusted, the sliding ball 17 can limit the up-and-down movement of the first lifting block 151, thus avoiding the problem of friction between the first lifting block 151 and the inner wall of the sliding frame 5 during long-term up-and-down movement, thereby improving the smoothness of the first lifting block 151's up-and-down movement.

[0037] It should be noted that the present invention is not limited to the specific structure shown in the accompanying drawings in the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art.

Claims

1. A shaft alignment device for steam turbine maintenance using laser alignment, characterized in that: The system includes a base plate (1) and a turbine body (2). An electric slide rail (3) is fixedly installed on the top of the base plate (1). A sliding seat (4) is movably sleeved on the top of the electric slide rail (3). A sliding frame (5) is fixedly connected to the top of the sliding seat (4). A sliding block (6) is movably sleeved on the top of the sliding frame (5). A speed reducer (7) is fixedly installed on the side of the sliding block (6). A winding wheel (8) is fixedly sleeved on the output shaft of the speed reducer (7). A wire rope (9) is fixedly sleeved inside the winding wheel (8). A lifting pulley (10) is movably sleeved outside the wire rope (9). A protective cover (11) is movably sleeved at the bottom of the lifting pulley (10). A detection host (12) is fixedly installed inside the protective cover (11). A detection component (13) is provided at the bottom of the protective cover (11). The detection component (13) includes: A limiting sleeve (131) is fixedly connected to the bottom of the protective cover (11). A first telescopic arm (132) is movably fitted inside the limiting sleeve (131), and a second telescopic arm (133) is movably fitted inside the limiting sleeve (131). One end of the first telescopic arm (132) is fixedly connected to a laser emitter (134). A laser rangefinder (135) is fixedly connected to the bottom of the laser emitter (134). There are three laser rangefinders (135), which are evenly distributed around the outside of the laser emitter (134). By setting the laser rangefinders (135), when… When it is necessary to perform turbine shaft alignment, the laser emitter (134) and laser rangefinder (135) are moved into the turbine body (2). At this time, the laser emitter (134) and laser rangefinder (135) are activated so that the three laser rangefinders (135) can detect the distance between the laser emitter (134) and the inner wall of the turbine body (2). One end of the second telescopic arm (133) is fixedly connected to a counterweight (136). The side of the sliding frame (5) is fixedly installed with a first drive motor (137). The output shaft of the first drive motor (137) is fixedly connected with a first threaded column (138). The first threaded column (138) is threaded into the inside of the sliding block (6).

2. The shaft laser alignment device for turbine maintenance according to claim 1, characterized in that: The counterweight (136) is made of stainless steel, and the weight of the counterweight (136) is the same as that of the counterweight (136).

3. The shaft laser alignment device for turbine maintenance according to claim 1, characterized in that: The limiting sleeve (131) is located directly below the protective cover (11), and the limiting sleeve (131) is adapted to the first telescopic arm (132).

4. The shaft laser alignment device for turbine maintenance according to claim 1, characterized in that: The limiting sleeve (131) is provided with an adjustment component (14), which includes a second drive motor (141). The second drive motor (141) is fixedly installed at the bottom of the inner cavity of the protective cover (11). A first bevel gear (142) is fixedly sleeved on the output shaft of the second drive motor (141). A double-threaded rod (143) is threaded inside the first telescopic arm (132). A second bevel gear (144) is fixedly sleeved on the outside of the double-threaded rod (143). The second bevel gear (144) meshes with the first bevel gear (142). An auxiliary mechanism (15) is provided inside the sliding frame (5).

5. The shaft laser alignment device for turbine maintenance according to claim 4, characterized in that: The auxiliary mechanism (15) includes a first lifting block (151), which is movably sleeved inside one side of the sliding frame (5). A second lifting block (152) is movably sleeved inside the other side of the sliding frame (5). A lifting beam (153) is fixedly connected to the side of the first lifting block (151). A magnet plate (154) is fixedly connected to the top of the lifting beam (153). A second threaded column (155) is movably sleeved inside the sliding frame (5). A magnet block (156) is fixedly connected to the bottom of the protective cover (11).

6. The shaft laser alignment device for turbine maintenance according to claim 5, characterized in that: The sliding frame (5) is provided with a lifting assembly (16) on its side. The lifting assembly (16) includes a No. 3 motor (161). The No. 3 motor (161) is fixedly installed on the side of the sliding frame (5). A transmission rod (162) is fixedly connected to the output shaft of the No. 3 motor (161). A No. 3 bevel gear (163) is fixedly sleeved on the outside of the transmission rod (162). A No. 4 bevel gear (164) is fixedly sleeved on the bottom of the No. 2 threaded column (155). The No. 4 bevel gear (164) meshes with the No. 3 bevel gear (163).

7. A shaft laser alignment device for turbine maintenance according to claim 5, characterized in that: The first lifting block (151) has a sliding ball (17) movably sleeved on its side. The number of the sliding balls (17) is several, and the several sliding balls (17) are evenly distributed on the side of the first lifting block (151).

Images